CODEWITHSUNDEEP
androidjsonarraylist
Noman
Noman

Reputation: 4109

Store Arraylist of custom objects

I have saved ArrayList of custom objects in the shared preferences like this: 

SharedPreferences prefs = context.getSharedPreferences("prefName", Context.MODE_PRIVATE);
Editor editor = prefs.edit();
editor.putStringSet("myList", new Gson().toJson(arraylist).toString());
editor.apply();

By doing this, once values are saved but when i exit from the app and relaunch and try to save new values then the old values are gone.
Any idea how can i save old values and append new ones?
I want to keep all values in the same array and keep array saved to show values every time when the app loads.

Upvotes: 1

Views: 560

Answers (3)

kajothan
kajothan

Reputation: 11

I hav faced this problem earlier... Use generics it will append the value rather than replacing the old datas....

Upvotes: 0

Bhavesh Jethani
Bhavesh Jethani

Reputation: 3875

This code may be work for you. 

 SharedPreferences setting=context.getSharedPreferences("prefName", Activity.MODE_PRIVATE);
 SharedPreferences.Editor edit=setting.edit();
 edit.putStringSet("myList", new Gson().toJson(arraylist).toString());
 edit.commit();

Upvotes: 0

class stacker
class stacker

Reputation: 5347

Read myList from prefName, append arraylist to what was already saved in the preferences, write back myList to preferences.

Upvotes: 1

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